Ambient Humidity: A Key Factor for Buying Fridges & Freezers

Last week, we explored ambient temperature and its critical role in choosing fridges and freezers. But what exactly is ambient humidity—and why is it another non-negotiable factor to weigh when shopping for these appliances?

Ambient humidity refers to the ratio of water vapor present in the air to the maximum amount of water vapor the air can hold at a specific temperature and location. The most common metric for this is Relative Humidity (RH), expressed as a percentage (%). For instance, at 25°C, air can hold a maximum of 23 grams of water vapor per cubic meter; if the actual water vapor content is 11.5 grams, the relative humidity is 50%.

Ambient humidity becomes particularly relevant if you’re considering a fridge or freezer with a glass door. The significant humidity difference between the appliance’s interior and the surrounding air can lead to condensation forming on the outside of the glass—obscuring your products and undermining the display’s purpose. That said, this issue varies drastically by location: in drier climates, it’s rarely a concern, while in more humid regions, it’s a key consideration.

Fortunately, there are simple solutions. Display fridges and freezers equipped with a fan cooling system typically prevent condensation on their own. If you opt for a model with a static cooling system, however, be sure to choose one that features defrost technology. This ensures your products remain visible and showcase-ready, even in higher humidity environments.